67 entries under ambiguous topic. ×
| unreliable(adjective, delicate, uncertain, nervous, unstable) | |
| borderline(adjective, clear, open, delicate, certain) | |
| incredible(adjective, great, extraordinary, unreasonable, fantastic) | |
| indistinct(adjective, obscure, rough, uncertain, dim) | |
| indeterminate(adjective, clear, obscure, rough, certain) | |
| problematical(adjective, clear, certain, uncertain, dubious) | |
| arguable(noun, adjective, certain, uncertain, unsettled) | |
| controversial(noun, adjective, uncertain, hot, unsettled) | |
| disreputable(adjective, dishonest, vague, dubious, unclear) | |
| undetermined(adjective, open, weak, rough, determined) | |
| clouded(adjective, clear, certain, uncertain, vague) | |
| hazy(adjective, uncertain, shaky, vague, unclear) | |
| open(adjective, uncertain, nervous, unstable, unsettled) | |
| unbelievable(adjective, great, extraordinary, unreasonable, fantastic) | |
| confused(adjective, weak, obscure, dark, uncertain) | |
| contingent(adjective, delicate, uncertain, unstable, shaky) | |
| puzzling(dark, strange, uncertain, unreasonable, vague) | |
| shifty(dishonest, vague, dubious, unreliable, crooked) | |
| undependable(adjective, uncertain, nervous, vague, dubious) | |
| ambivalent(adjective, open, vague, unsure) |
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| APA | Smart Define. (2016). doubtful thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, doubtful thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>. |
| MLA | Smart Define. "doubtful thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms> |